Three Phase Induction Motors
Reduced voltage starter can be used with

Squirrel cage induction motor only but not with slip ring motor
Slip ring motor only but not with squirrel cage induction motor
Squirrel cage as well as slip ring induction motor
None of these

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Three Phase Induction Motors
As load on an induction motor goes on increasing

Its power factor goes on decreasing
Its power factor goes on increasing even after full load
Its power factor remains constant
Its power factor goes on increasing up to full load and then it falls again

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